试验模型位移场中的几种光学测量方法比较

详细地分析了几种光学测试方法在模型试验中的使用情况。自动网格法在模型表面布置网格点容易，由于开挖或裂缝等原因去掉网格点，改进后的程序仍能自动编码，必要时可通过人机对话手工编码。散斑互相关法，在模型表面布置散斑较容易，改进后的程序在开挖情况下也能自动处理，但在散斑场遭受严重破坏情况下无法比较相关性。其他光学测试技术由于受试验条件的限制，而不适合使用。

Comparison of several optical measurement methods applied to measure displacement of test model

Several optical measurement methods applied to measure displacement of model are discussed. For automated grid method, grid dots are arranged easily on model surface. After improving the program, dots can be encoded automatically in the condition of removing dots, and can be encoded handily by human-computer dialogue if necessary. For speckle correlation method, speckle is arranged easily on model surface. After improving the program, displacement can be acquired automatically in the condition of removing speckle. Displacement cannot be acquired if speckle is destroyed badly. Other optical methods are not suitable for experiment conditions.